Question about 1999 GMC Sonoma

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1999 GMC Sonoma check engine light on when gas tank full

The check engine light is on & truck seems to bog down when the gas tank is full. When the gas tank is half full the check engine light goes off and the truck runs good.

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I have had the same problem and i found that it was the fuel pump causing the problem

Posted on May 11, 2009

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1 Answer

What would case my 99 gmc jimmy to bog down and run rough when giving it gas


If you have replaced the fuel filter this year, the next thing to check is fuel pressure with a gauge. GM vortec engines require 60psi or more to run.
If the check engine light is on you should also have the computer scanned for trouble codes.

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I need the fireing order for a 2000 sonoma 4.3 vortec and when i put the gas pedal to the floor it bogs down i just did a complete tune up and it still does it and no engine light is on


2000 GMC S15/T15 Sonoma P/U 4.3 liter V-6 VIN "X"
and
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Hope helps (remember to rate this answer).

Feb 25, 2011 | GMC Sonoma Cars & Trucks

1 Answer

SERVICE ENGINE SOON light comes on & off every 130 miles or so on my 99 GMC Sonoma. Had plugs, wires, cap & exhaust changed.


There to many things that can set off the service engine light on. If there is an Auto Zone or Parts Source around you, have your Sonoma scanned for the DTC codes. It cold be as simple as a faulty gas cap that is setting off your service light to come on.
Thank you for using Fixya.

Mar 26, 2010 | 1999 GMC Sonoma

2 Answers

2000 gmc sonoma service engine light on and flashing. Bogs down during start up and while sitting. Also going through gas really fast.


sound like the O2 sensor or PCV... take the car to autozone and they will use the ODB reader on it for free.I suspect one or the other sensor. How many miles do you have on it?

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When was the last time the fuel filter was chg.? If thats not an issue best to get a fuel pressure test.

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1988 GMC C1500 pick up won't take more than 1/4 throttle. I punched out the catalitic converter and it still wont run at full power. I"ve had the throttle body gasket replaced as well, with no results....


I would not only put ANOTHER new fuel filter on, bot I would also be concerned about WHAT IS IN THE GAS TANK ? besdes fuel, and is the FUEL FRESH ? Hope this Helps .

Apr 07, 2009 | 1999 GMC Sonoma

2 Answers

Engine bog down


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Oct 29, 2008 | 1999 GMC Sonoma

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